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/** @file
ScanMem32() implementation.
Copyright (c) 2006, Intel Corporation<BR>
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
Module Name: ScanMem32Wrapper.c
The following BaseMemoryLib instances share the same version of this file:
BaseMemoryLib
BaseMemoryLibMmx
BaseMemoryLibSse2
BaseMemoryLibRepStr
PeiMemoryLib
UefiMemoryLib
**/
#include "MemLibInternals.h"
/**
Scans a target buffer for a 32-bit value, and returns a pointer to the
matching 32-bit value in the target buffer.
This function searches target the buffer specified by Buffer and Length from
the lowest address to the highest address at 32-bit increments for a 32-bit
value that matches Value. If a match is found, then a pointer to the matching
value in the target buffer is returned. If no match is found, then NULL is
returned. If Length is 0, then NULL is returned.
If Buffer is NULL, then ASSERT().
If Buffer is not aligned on a 32-bit boundary, then ASSERT().
If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
@param Buffer Pointer to the target buffer to scan.
@param Length Number of bytes in Buffer to scan.
@param Value Value to search for in the target buffer.
@return Pointer to the first occurrence or NULL if not found.
@retval NULL if Length == 0 or Value was not found.
**/
VOID *
EFIAPI
ScanMem32 (
IN CONST VOID *Buffer,
IN UINTN Length,
IN UINT32 Value
)
{
ASSERT (Buffer != NULL);
ASSERT (((UINTN)Buffer & (sizeof (Value) - 1)) == 0);
ASSERT (Length <= MAX_ADDRESS + (UINTN)Buffer + 1);
if ((Length /= sizeof (Value)) == 0) {
return NULL;
}
return (VOID*)InternalMemScanMem32 (Buffer, Length, Value);
}
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